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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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4513 датащи(PDF) 161 Page - Renesas Technology Corp |
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4513 датащи(HTML) 161 Page - Renesas Technology Corp |
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161 / 210 page  APPLICATION 2-58 4513/4514 Group User’s Manual 2.8 Voltage drop detection circuit 2.8 Voltage drop detection circuit The built-in voltage drop detection circuit is designed to detect a drop in voltage and to reset the microcomputer if the supply voltage drops below a set value. Figure 2.8.1 shows the voltage drop detection reset circuit, and Figure 2.8.2 shows the operation waveform example of the voltage drop detection circuit. Fig. 2.8.1 Voltage drop detection reset circuit Fig. 2.8.2 Voltage drop detection circuit operation waveform Note: Refer to section “3.1 Electrical characteristics” for the reset voltage of the voltage drop detection circuit. Voltage drop detection circuit Internal reset signal RESET pin Watchdog timer output WEF Note: The output structure of RESET pin is N-channel open-drain. VDD VRST (detection voltage) Voltage drop detection circuit output The microcomputer starts operation after f(XIN) is counted 16892 to 16895 times. RESET pin Notes 1: Pull-up RESET pin externally. 2: Refer to the voltage drop detection circuit in the electrical characteristics for the rating value of VRST (detection voltage). |
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